Event Selection

We select W (Z) events by requiring at least one(two) EM clusters and at least one (two) electrons that passes an electron id cuts. For Z's we require at least one electron to have an associated track and forward electrons always have to have an associated track.

CC W
EC W
CC-CC Z
CC-EC Z
EC-EC Z

Events
28420
11090
2091
1265
422

The number of W and Z candidate events.

We select central electron by requiring :

EM fraction > 0.9
H-matrix chi² < 100
track match significance < 5
electron isolation < 0.15
| Z_clus | < 108 cm
| Z_trk | < 80 cm
10% phi cut on either side of CC module edge

We select forward electron by requiring :

EM fraction > 0.9
H-matrix chi² < 200
track match significance < 10
electron isolation < 0.15
4-variable likelihood ration l₄ < 4.0
1.5 < eta_det< 2.5

We select the W sample by requiring :

RECO versions in the range [12.13,12.25]
EM1_EISTRKCC_MS trigger
neither MICRO_BLANK nore MRBS_LOSS conditios should be true
p_t(e) > 25 GeV (CC) or p_t(e) > 30 GeV (EC)
p_t(nu) > 25 GeV (CC) or p_t(nu) > 30 GeV (EC)
p_t(W) < 15 GeV
| Z_vtx | < 100 cm

We select the Z sample by requiring :

RECO versions in the range [12.13,12.25]
EM2_EIS2_HI trigger
two electrons with p_t(e) > 25 GeV (CC) or p_t(e) > 30 GeV (EC)
60 < m_ee < 120 GeV
| Z_vtx | < 100 cm
at least one electron has a track, and a forward electron always has a track.

Event Selection

CC W

EC W

CC-CC Z

CC-EC Z

EC-EC Z

Events

28420

11090

2091

1265

422

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